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A friction coefficient map of the surface of an immiscible polymer blend has been constructed using data obtained with the atomic force microscope. Spatially resolved friction coefficients, obtained from gradients of linear plots of frictional force versus applied load, were used to construct the map, with corresponding frictional forces being derived from lateral force data and the lateral spring constant. Values of the friction coefficient were confirmed using an Si 3 N 4 /Si 3 N 4 couple, for which literature values were available. Excellent agreement with the literature was observed through the use of this method.
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Breakspear et al. (2004) studied this question.
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